Index: /CKEditor/trunk/CHANGES.html
===================================================================
--- /CKEditor/trunk/CHANGES.html	(revision 5521)
+++ /CKEditor/trunk/CHANGES.html	(revision 5522)
@@ -98,4 +98,5 @@
 		<li><a href="http://dev.fckeditor.net/ticket/5744">#5744</a> : Remove editor with SCAYT enabled in source mode throws error.</li>
 		<li><a href="http://dev.fckeditor.net/ticket/5719">#5719</a> : [IE] 'change' dialog event should not be triggered when dialog is already closed.</li>
+		<li><a href="http://dev.fckeditor.net/ticket/5747">#5747</a> : [IE] Error thrown when IE input field editing mode is turned on.</li>
 		<li>Updated the following language files:<ul>
 			<li><a href="http://dev.fckeditor.net/ticket/5432">#5432</a> : Dutch;</li>
Index: /CKEditor/trunk/_source/plugins/selection/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/selection/plugin.js	(revision 5521)
+++ /CKEditor/trunk/_source/plugins/selection/plugin.js	(revision 5522)
@@ -232,4 +232,13 @@
 										return;
 									}
+								}
+
+								// Avoid saving selection from within text input. (#5747)
+								var parentTag;
+								if ( nativeSel.type == 'Text'
+									&& ( parentTag = nativeSel.createRange().parentElement().nodeName.toLowerCase() )
+									&& parentTag in { input: 1, textarea : 1 } )
+								{
+									return;
 								}